97 bonnefire...can anyone tell me the spark plug

Check the firing order and plug wires. A wire might be crossed or you might have a bad wire. See attached for firing order. Also, run the engine at nigh in the dark and look for blue sparks along the plug wires. If you see them, you need new wires.

1997 Pontiac firing order is 165432

No, the longer length will not cause your problem. The longer wires are simply for the plugs longest from the distributor cap (or coil pack) to the spark plug, and no particular length is critical, just as long as all wires will fit.
Do you mean it ran fine before you changed the wires and plugs? If so, you may have one or two not fully seated at one end or the other. Go back and make sure each wire is pushed in correctly, You should hear or feel the new wire snap over the new spark plug.

you will find the spark plugs it self by following the wiring thats going into the engine block if it a 6 cyclinder there is 6 wires change one spark plug one at a time DO NOT pull all the plugs out cause u will not remember the order they go inand thats the firing pattern if u lose the firing pattern u will have to call a mechanic or go online and look it up.

Here is the firing order diagram for that vehicle, and if the ignition wires are not crossed then one of the spark plugs might have been damaged while installing it and the spark plug gap closed on one of the spark plugs, or one of the ignition wires (spark plug wires) has been damaged, and if those wires are over 5 years old then you should replace them. I hope that this helps you to solve your problem.

The ign coils should be marked. The front cylinders are 1 3 5 and the rears are 2 4 6..... the coils starting from the front is 1,4 5,2 3,6

It is stamped on the top of the engine, in the head. It is usually pretty easy to find, and you wont have to remove any pieces to see it.

Hi,
I don't know your engine size, but the link below is a picture of the GM small block firing order with distributor.
The firing order, which should be cast into the intake manifold, for the chevy small block V8 is 1-8-4-3-6-5-7-2. The firing order is the numerical sequence in which the spark plugs are fired. The insertion position of each spark plug wire around the circumference of the distributor cap can be found according to a clock face. The insertion sequence determines the firing order. The firing order is followed clockwise around the distributor cap starting from the 6:30 position with the 6:30 position being the number one cylinder spark plug wire.

http://www.classiccarauto.com/impala/how_to/images/distributor.png

Hope this helps...

Firing order is 1-6-5-4-3-2. Distributor cap should be numbered. Number one cylinder is front on driver's side (3 and 5 follow on same side). Number 2 is front on passenger's side (followed by 4 and 6).

3.9L V6 Engine. Engine Firing Order: 1-6-5-4-3-2. Distributor Rotation: Clockwise.............did i guess the right motor? let me know/rate me